hydroquinone/zea mays

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Toxicity and carcinogenicity of hydroquinone in F344/N rats and B6C3F1 mice.

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Toxicology and carcinogenesis studies were conducted by administering hydroquinone (more than 99% pure) by gavage to groups of F344/N rats and B6C3F1 mice of each sex for 14 days, 13 wk or 2 yr. 14-day studies were conducted by administering hydroquinone in corn oil to rats at doses ranging from 63

The molecular mechanisms of liver and islets of Langerhans toxicity by benzene and its metabolite hydroquinone in vivo and in vitro.

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Benzene (C6H6) is one of the most commonly used industrial chemicals causing environmental pollution. This study aimed to examine the effect of benzene and its metabolite hydroquinone on glucose regulating organs, liver and pancreas, and to reveal the involved toxic mechanisms, in rats. In the in

Hydroquinone peroxidase activity of maize root mitochondria.

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The oxidation of hydroquinone with H(2)O(2) in the presence of mitochondria isolated from maize (Zea mays L.) roots was studied. The results indicate that a reduced form of quinone may be a substrate of mitochondrial peroxidases. Specific activities in different mitochondrial isolates, the apparent

NTP Toxicology and Carcinogenesis Studies of Hydroquinone (CAS No. 123-31-9) in F344/N Rats and B6C3F1 Mice (Gavage Studies).

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Hydroquinone is used an antioxidant in the rubber industry and as a developing agent in photography. It is also an intermediate in the manufacture of rubber and food antioxidants and monomer inhibitors. Hydroquinone and products containing hydroquinone are used as depigmenting agents to lighten

Chemical constituents and free radical scavenging activity of corn pollen collected from Apis mellifera hives compared to floral corn pollen at Nan, Thailand.

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BACKGROUND Bee pollen is composed of floral pollen mixed with nectar and bee secretion that is collected by foraging honey (Apis sp.) and stingless bees. It is rich in nutrients, such as sugars, proteins, lipids, vitamins and flavonoids, and has been ascribed antiproliferative, anti-allergenic,

Modifications in the metabolic pathways of benzene in streptozotocin-induced diabetic rat.

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Benzene is a ubiquitous environmental pollutant primarily metabolized by a cytochrome P-450 (CYP-450) isoenzyme, CYP-450 IIE1. A consistent induction of CYP450 IIE1 has been observed in both rat and human affected by diabetes mellitus. The aim of this study was to evaluate whether streptozotocin

Single dose parenteral hyposensitization to poison ivy urushiol in guinea pigs.

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Studies were carried out in guinea pigs to evaluate the potential for single dose hyposensitization to poison ivy urushiol dermatitis. Sensitization was induced by topical application of 1 mg of poison ivy urushiol to the back of the neck. In the first series of studies, three different analogs of

Dietary fish oil inhibits human breast carcinoma growth: a function of increased lipid peroxidation.

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Female athymic nude mice were implanted subcutaneously with human breast carcinoma MDA-MB231. Seven to ten days later, the mice were divided into groups and fed a purified diet containing the following types of fat (% of diet): (i) 20% corn oil (CO); (ii) 15% CO:5% fish (menhaden) oil (FO); (iii)

Transplacental benzene exposure increases tumor incidence in mouse offspring: possible role of fetal benzene metabolism.

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Childhood cancer is the leading cause of disease-related death in children aged 1-14 years in Canada and the USA and it has been hypothesized that transplacental exposure to environmental carcinogens such as benzene may contribute to the etiology of these cancers. Our objectives were to determine if

Ozonation Products of Organosolvolytic Extracts from Vegetal Materials.

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The ozonation of lignin in an organic solution was used to produce oxyaromatic compounds. Corn (Zea mays) stalk and poplar (Populus deltoides) wood lignin solutions (organosolvolytic juices) obtained from their respective autohydrolyzed materials and an organosolv lignin were treated with ozone, and

Physical and chemical changes in isolated chylomicrons: prevention by EDTA.

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When washed chylomicrons obtained from the lymph of rats, which had been fed corn oil, were maintained at 0-4 degrees C in 0.9% NaCl, the following physical and chemical changes were observed to occur: increased polarity of chylomicron lipids, increased ultraviolet absorption of chylomicron lipids

Effect of dietary fat on growth of MCF-7 and MDA-MB231 human breast carcinomas in athymic nude mice: relationship between carcinoma growth and lipid peroxidation product levels.

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Human breast carcinoma cell lines MCF-7 and MDA-MB231 were transplanted s.c. to female athymic nude mice at 3-4 weeks of age. At 7-10 days after transplantation, the mice were divided into groups and fed for 6-8 weeks one of the following semi-purified diets containing different amounts and types of

Pomegranate peel methanolic-extract improves the shelf-life of edible-oils under accelerated oxidation conditions.

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Natural antioxidants extracted from agri-waste resources have gained increased economic, sustainable, and health attention due to their sustainability, safer food-applications, and beneficial components. Pomegranate peel extracts (Punica Granatum L.) have natural phytochemicals with superior

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